6 a] Explain mechanism of filtration in human kidney
Introduction:- Kidneys are two bean-shaped organs located just below the rib cage; they function as a filtration system by removing toxic wastes and extra fluid from the body. Healthy kidneys filter about half a cup of blood every minute, removing waste and extra water in the form of urine. The urine flows from the kidneys to the bladder through ureters connected to the bladder and stored in it
Parts of kidney
- Each kidney comprises about a million filtering units called nephrons.
- Each nephron includes a filter, called the glomerulus, and a tubule.
- Glomerulus filters blood, and the Tubule removes wastes (Urine).
As blood flows across each nephron and enters to glomerulus through blood vessels, the thin walls of the glomerulus filter the smaller molecules and allow larger molecules, such as proteins and blood cells stay in the blood vessel. The tubule returns needed substances to your blood and removes wastes in urine. The tubule helps remove excess acid from the blood.
